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Creating surfaces for Boolean Subtraction

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Old   July 25, 2020, 11:50
Default Creating surfaces for Boolean Subtraction
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mindthegap_ar
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Hello all,

I'm modelling a 3D wing and wasn't getting a great mesh at my trailing edge it was more rectangular than it was curved, so I went back into my CAD and created the trailing edge as a separate body that I could add a custom surface control to. Now my issue is I cannot keep the trailing edge body separate from the rest of the wing when I perform a Boolean subtraction, no matter how many times I try rename surfaces differently before the Boolean operation StarCCM+ always goes against my wishes and combines surfaces with others. Maybe it's something simple that I'm missing but any help would be appreciated, I've attached some screenshots of how I would like to keep the wing as two bodies; wing (without TE) and the TE, the third screenshot is of the result StarCCM+ gives me.

Thanks
Attached Images
File Type: jpg Wing.jpg (15.8 KB, 9 views)
File Type: jpg TE.jpg (16.2 KB, 8 views)
File Type: jpg RESULT.jpg (15.4 KB, 7 views)
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Old   July 26, 2020, 14:40
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cwl
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Quote:
Originally Posted by mindthegap95@icloud.com View Post
Hello all,

I'm modelling a 3D wing and wasn't getting a great mesh at my trailing edge it was more rectangular than it was curved, so I went back into my CAD and created the trailing edge as a separate body that I could add a custom surface control to.
Thanks
Would be easier just to split surface by imprinting a sketch for example.


Quote:
Originally Posted by mindthegap95@icloud.com View Post
Now my issue is I cannot keep the trailing edge body separate from the rest of the wing when I perform a Boolean subtraction, no matter how many times I try rename surfaces differently before the Boolean operation StarCCM+ always goes against my wishes and combines surfaces with others. Maybe it's something simple that I'm missing but any help would be appreciated, I've attached some screenshots of how I would like to keep the wing as two bodies; wing (without TE) and the TE, the third screenshot is of the result StarCCM+ gives me.
Sounds confusing. Can you upload the simulation if that is possible? - Would make it much easier to deal with the problem.
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Old   July 26, 2020, 15:06
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Quote:
Originally Posted by cwl View Post
Would be easier just to split surface by imprinting a sketch for example.



Sounds confusing. Can you upload the simulation if that is possible? - Would make it much easier to deal with the problem.
Thank you for your response Chaotic Water,

What do you mean by split surface through imprinting a sketch?


Sure I can upload the simulation, I have named two bodies 'aerofoil front" and "trailing edge" the rest are the vortex generators.. what I am trying to achieve is for the "aerofoil front" and "trailing edge" bodies to not merge faces with one another after a boolean subtraction operation. The reason being is so I can add separate control surfaces to each in other to make the meshing process easier.

Thanks
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mesh, part contacts, starccm+, subtract, surface

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